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This article mainly introduces "what is the applicability of the Ajax framework". In the daily operation, I believe that many people have doubts about the applicability of the Ajax framework. The editor consulted all kinds of materials and sorted out simple and easy-to-use methods of operation. I hope it will be helpful to answer the doubts about the applicability of the Ajax framework. Next, please follow the editor to study!

Simplify the difficulty of using JavaScript

Many developers underestimate the difficulty of JavaScript. In the past, JavaScript was often regarded as a disturbing gadget, either popping out of windows or fancy applications such as racing lanterns and dynamic text. However, JavaScript's unique object concept and flexible syntax give it the powerful ability to manipulate the document object model (DOM) and manipulate CSS, and to make full use of browser XMLHttpRequest objects, which lays a foundation for today's Ajax.

It is not as easy to master these applications as you might imagine, because the way of implementation is flexible, as long as you examine the syntax of each framework, you can find that there are great differences between them. However, various existing frameworks aim to simplify the application difficulty of JavaScript, so using Ajax framework allows developers to focus on development work more quickly.

Solve the annoying browser compatibility problem

Even if developers are skilled enough to master JavaScript syntax easily, they usually fail when they encounter a dazzling variety of browsers. Different browsers have different support for document parsing and syntax, and sometimes show different behaviors on various operating systems or versions (such as the difference between IE6 and IE7), which makes the bottleneck of many JavaScript applications occur in compatibility. One of the benefits of using the Ajax framework is that it has addressed browser compatibility issues for developers in advance.

The development process becomes simpler

Those who have developed asynchronous transfer programs will surely realize that the writing process is quite cumbersome and must check the details such as backend status, specified back-end applications and callback programs, which are usually simplified by the Ajax framework, reducing the time for developers to struggle with the details. In addition, many Ajax frameworks provide drag components, animation effects, dynamic menus, etc., which can be used only by specifying methods, saving a lot of development effort.

However, the Ajax framework is implemented in different ways, from JavaScript syntax development to .NET or Java implementation; in addition to being implemented on the client side, there are also ways to implement it on the server side. We specifically selected ten Ajax frameworks to let developers know the applicability of each Ajax framework.

1. APS.NET 's official solution

ASP.NET AJAX is a solution based on Microsoft. Net platform, which provides AJAX technology and JavaScript integration mechanism that cover both server side and client side. By downloading and installing ASP.NET AJAX into Visual Studio 2005, you can use preset controls to develop some visual effects and asynchronous transmission applications.

In addition, ASP.NET AJAX provides the Toolkit of the control, including the base categories and project templates that developers need to develop their own AJAX applications. In addition to dealing with browser compatibility issues, ASP.NET AJAX also allows client-side JavaScript to add object-oriented features, such as type systems, data types, namespaces, events, etc., to make code easier to debug, maintain and reuse.

Although ASP.NET AJAX provides server and client solutions, and Visual Studio2005 enhancements also make it easier to develop and debug, compared with other AJAX frameworks, many AJAX effects and features are still in the testing stage (for users to test in the CTP version), and the features that can be applied are limited.

two。 Support function

While some lightweight Ajax frameworks are designed to solve the ease-of-use or special effects problems encountered by JavaScript, Dojo is more like a comprehensive package of JavaScript tools that claims to slow down front-end development of web pages or web applications.

Dojo supports dynamic effects such as drag, fade out, fade in, move, transparent, and manipulate SVG files. Its Widget also allows users to easily use menu, tab, tree structure, calendar, text editor and other effects. Of course, it also supports Ajax functions of asynchronous processing.

In addition, because Ajax manipulates file objects in a dynamic way, users are accustomed to using the functions of the previous page and the next page, and cannot make use of functions such as "my *" to leave the correct bookmarks for the pages they need, but these requirements have been solved by Dojo. Compared with other lightweight Ajax frameworks, it obviously takes more effort to get familiar with Dojo, and fewer documents are also a problem. However, because its functions are more complete, there are relatively few areas that developers need to process themselves.

3. Java syntax can be called by JavaScript

DWR is an Ajax framework designed for the Java language that allows developers to use JavaScript programs to call Java syntax. The operation of DWR can be divided into two parts, one is used in the browser to connect to the server-side Java program, and the other is used to display the returned data. The function that calls Java through DWR handles the details of the connection processing, and when the data is processed, DWR executes the callback function for subsequent rendering.

When you install DWR, you must edit the deployment description file for the Web application, as well as the DWR-specific file. The DWR profile specifies the categories that can be remotely established and called. The file contains the JAR file of the server code, as well as the JavaScript file, which provides auxiliary functions to deal with the effect of interactive rendering.

The advantage of DWR*** is that it allows Java developers to use familiar syntax to process pages and data, and to use it with Struts and Tapestry. However, Java programs that call remote servers from users still have some security concerns that must be paid attention to when using them.

4. Aim at ease of use and simplification of syntax

JQuery is the Ajax framework that has attracted a lot of attention recently. It is based on Prototype and simplifies and enhances the functionality of JavaScript syntax. JQuery is a bit like taking what Prototype does to the extreme, allowing users to change the way they write JavaScript. It is most praised for its powerful ability to access page elements, whether it is the node of the file, the picker of CSS or the Xpath expression, which can be accessed quickly by using the "$()" function and give it more functions. (51CTO related articles recommend: use jQuery to simplify Ajax development)

In addition, its chainable method combines a string of handlers to make the code more concise. In addition, jQuery also provides some dynamic effects, but compared with other frameworks, this part is much more attractive.

The pros and cons of jQuery are all in the same thing. On the one hand, it simplifies the syntax of JavaScript and makes it easier to write programs. For the purpose of ease of use, it is indeed quite successful. However, this makes the JavaScript code develop in a different way, and for beginners, it takes some time to get used to it.

5. Download modular tools according to functional requirements

The predecessor of Moo.fx, which is famous for its lightness, has similar concepts and syntax to Prototype, but it is more thorough in object orientation, and provides more functions and applications in animation effects and interactive behavior, allowing users to write JavaScript syntax of object-oriented concepts more quickly.

According to the module, the download file of MooTools is divided into core, category, native syntax, web element, browser window, animation effect, drag, remote transmission and plug-in. In addition to the core program that is necessary to download, other JavaScript files can be downloaded according to the needs of users, so as to reduce the file size.

Although MooTools makes the result of JavaScirpt object orientation more thorough, which is beneficial to the expansion and maintenance of the program, it also challenges those who are familiar with the JavaScript object view, which takes more time to adapt. However, whether it is the presentation of the website itself, the presentation of program syntax, or even the module download interface, MooTools shows quite exquisite dynamic effects. Participating in the demonstration of the website will soon be implemented.

6. Greatly expand the basic functions of JavaScript

Unlike other frameworks, Prototype has many dazzling dynamic effects, but focuses on improving the functionality of JavaScript itself, making JavaScript easier to use and more object-oriented.

Prototype provides a lot of convenient syntax in simplifying the JavaScript method, such as the "$()" function. As long as the ID of the DOM node is passed into this function, the node object can be obtained, simplifying the operation of DOM. And this approach has almost become a function extended by other development frameworks. Other functions such as "$F ()" function can directly deal with the value of Web form elements, "$A ()" function can convert enumerated strings into arrays, and so on, are classic Prototype features.

In asynchronous processing, it also provides Ajax.Request, Ajax.Updater and other categories, so that developers can use the methods it provides when dealing with asynchronous operations to make ditch traffic easier and correct. Although Prototype doesn't have many fancy features, it simplifies the features of JavaScript and still attracts many Web developers.

7. Smooth and rich animation effects

Rico is an Ajax framework based on Prototype. In Spanish, "rico" means "rich", which also shows that Rico's goal is to provide developers with rich web components and applications using JavaScript.

Rico provides asynchronous Ajax applications that allow asynchronous responses to be routed to one or more callbacks to manipulate DOM or JavaScript objects. In terms of animation effects, support such as drag, scaling, formality, progress indicators and fade techniques can immediately apply rich effects.

Because Rico aims to make JavaScript show Flash-like animation, changes in color, shape or drop-down effects like web components are quite smooth, and DIV squares can be rounded, making the visual performance more Web 2.0 style.

The LiveGrid function of Rico is also praised. It can make the form data produce more diverse ways of expression and break through the viewing behavior of the form. For example, it allows users to dynamically download data when they touch the scroll. in this way, they can be downloaded in segments without the need for paging viewing.

8. Designated framework for RoR and CakePHP

Script.aculo.us is an Ajax framework based on Prototype. It is a lightweight framework for solving visual effects and interactive behavior. CakePHP, the development framework on Ruby on Rails and PHP, all use Script.aculo.us as an Ajax solution.

In terms of visual effects, Script.aculo.us uses changes in transparency, size, position, and combination of the above three elements to produce a variety of visual effects, such as fade in, fade out, flash, prompt, and so on, which can make page effects more changeable and guide users to interact with interface programs.

In terms of interactive interface, it provides drag components, in-place editing components (In-Place Editor), horizontal and vertical pull scrolls, automatic completion, component sorting, shopping carts, etc., these pre-packaged functions solve the problem of browser compatibility, but also allow users to easily import directly into the existing project functions, saving self-development time. In addition, Script.aculo.us includes a unit test (Unit Test) framework that can take advantage of its own test objects to verify the state of program execution and support mouse and keyboard simulation.

9. There's Yahoo! The framework of website service endorsement

Yahoo! User Interface (YUI) is Yahoo! The Ajax framework provides a convenient way to develop with many JavaScript libraries, and users can use it to develop interactive interfaces and Ajax effects. YUI can be divided into three parts, including tools, CSS and control components and other function libraries, tools are the core objects, responsible for some of the lower processing functions, CSS provides tools such as layout and font. The control elements have tools such as automatic completion, monthly calendar and tree structure.

Due to the practical application of YUI in Yahoo! Therefore, the reliability of the implementation is quite good, and many examples and documents are provided on the YUI website to help users get started quickly. Although YUI is made up of Yahoo! However, it follows the syntax rules of JavaScript and separates style, content and behavior. It is also quite easy for developers to expand their functions. Generally, the Ajax framework needs to be placed on the server side of the website. With the page downloaded together, YUI not only adopts this way, but also provides a way to use links. Users only need to point the path to the YUI host in the page of the application.

10. Enterprise-level solution suitable for Java Development Environment

ZK is a web application development framework based on Ajax, XUL (XML User Interface Language) and Java, which allows web pages to behave like desktop applications. Different from the client-side Ajax solution, ZK starts from the server side and uses ZK to deal with the Ajax interaction engine to deal with the user-side page behavior, thus greatly reducing the browser compatibility problems often encountered when using JavaScript as a dynamic development syntax.

ZK provides more than 70 XUL assemblies and 80 XHTML assemblies, so ZK provides off-the-shelf tools for users to apply some of the common functions of web pages or applications, which can be generated by using ZK's XML-based interface design language. On the other hand, the application can use the Java language to handle program logic and data transfer at the back end. Because ZK is developed in the Java language and is a server-centric solution, an application server that supports Java, such as Tomcat, must be installed to run.

At this point, the study on "what is the applicability of the Ajax framework" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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